111. The board may summon witnesses, including the parties, and examine them under oath or solemn affirmation.
Witnesses shall be summoned in writing by the secretary of the section on the demand of a party or of the chairman of the section or division.
The writing must be mailed to the witnesses at least ten days before the day of the hearing.
However, a summons may also be made in the manner and within the time allowed in articles 280 to 284 of the Code of Civil Procedure, mutatismutandis.